MRCOOL DIY 5th Gen 2-Zone Ductless Mini Split AC & Heat Pump 27000 BTU (12K+12K), Wall Mount Units, 230V
A multi-zone heating & cooling system designed for simple setup, smart control, and efficient year-round comfort.
Overview
Take full control of your indoor climate with a DIY-focused multi-zone mini split system that delivers efficient heating, cooling, and dehumidification with independent control in each area.
DIY-MULTI4-27HP230D-O + 2X DIY-12-HP-WMAH-230D25-O
DIY-MULTI4-27HP230D-O
23
25
Why Homeowners Love It
- DIY-friendly setup: Designed to reduce install complexity and avoid specialized HVAC steps when using DIY Quick Connect line sets.
- Whole-home zoning: Set different temperatures in different rooms for more comfort and less wasted energy.
- Smart control: Manage each zone with app control and voice assistants.
- All-season comfort: Cooling, heating, dry/dehumidify, and auto modes for changing weather.
- Built to last: Gold Fin condenser coating helps resist corrosion in harsh climates.
What’s Included
- (1) Outdoor condenser: DIY-MULTI4-27HP230D-O
- Indoor units:
- 12,000 BTU (x2) — Model: DIY-12-HP-WMAH-230D25-O
- Wireless remotes (zone control)
- DIY Quick Connect line sets (installation kit must be selected to be included; DIY Quick Connect line sets are the pre-charged component)
- Installation accessories & documentation (see Documents & Downloads)
Mrcool DIY Multi-Zones
Key Features
- DIY Quick Connect compatibility: Pre-charged line sets (when included/selected) can eliminate vacuum pump and gauge steps.
- Energy-efficient inverter performance for stable temperatures and lower operating costs.
- Gold Fin condenser for corrosion resistance and durability.
- Room-by-room airflow control and washable filters for simple upkeep.
- Display & diagnostics on the indoor unit for quick status checks.
- Low-ambient performance with heating capability down to -13°F.
DIY Quick Connect line sets are model-specific and must match the system. Always follow the installation manual for your exact configuration.
Comfort Modes
- Auto: Automatically selects heating or cooling to maintain setpoint.
- Cool / Heat: Dedicated modes for seasonal comfort.
- Dry: Dehumidifies while maintaining comfort.
- Sleep: Energy-saving overnight profile.
- Timer: Scheduled on/off for efficiency.
Warranty
Coverage commonly includes a 7-year compressor warranty and a 5-year parts warranty (registration requirements apply).
Optional lifetime compressor coverage may be available depending on program/registration.
Indoor Specs
Outdoor Specs
Helpful Notes
Mixing indoor unit types
Many multi-zone configurations allow mixing compatible wall mounts and other indoor styles. Confirm compatibility for your condenser model before ordering.
DIY Quick Connect line sets
The “pre-charged” component is the DIY Quick Connect line set (when included/selected). Follow the install manual for required accessories, connections, and any long-line rules.
Electrical & breaker sizing
Use MCA (23) and Max Fuse/Breaker (25) as starting points, then size per the installation manual and local code.
Line sizing
Indoor line sizes: 1/4 / 3/8. Confirm final line sizes and allowable lengths for your exact pairing before selecting a line set.
